<template>
  <div class="login_container">
      <div class="login_box">
          <div class="avatar_box">
              <!-- 头像区 -->
              <img src="../assets/01.png" alt="" class="img">
              <!-- 登录表单区 -->
          </div>
          <!-- 表单数据绑定  通过el-form上:model绑定数据对象，v-model绑定具体的值   :rules指定校验规则，prop:指定校验具体的校验规则-->
          <el-form  class="login_form" label-width="0px" :model = "loginForm" :rules="loginFormRule" ref="loginFormRef">
                  <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input prefix-icon="el-icon-user-solid" v-model="loginForm.username" ></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input prefix-icon="el-icon-unlock" v-model="loginForm.password" type="password" ></el-input>
                </el-form-item>
                <el-form-item  class="btns">
                    <el-button type="primary" @click="validateLoginForm">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
      </div>
  </div>
</template>

<script>
export default {
    data() {
        return {
            // 登录表单的数据绑定对象
            loginForm:{
                username:'admin',
                password:'123456'
            },
            loginFormRule:{
                username: [
                    { required: true, message: '请输入用户名', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                password: [
                    { required: true, message: '请输入登录密码', trigger: 'blur' },
                    { min: 5, max: 16, message: '长度在 5 到 16 个字符', trigger: 'blur' }
                ]
            }
        }
    },
    methods:{
        resetLoginForm() {
            // 下面这个  可以通过ref后面的值，拿到表单的实例对象，实例对象上有很多方法
            this.$refs.loginFormRef.resetFields()
        },
        validateLoginForm() {
            this.$refs.loginFormRef.validate(async valid => {
                if(!valid) return
                // 对数据进行解构赋值，重命名为res对象
                const {data:res} =  await this.$http.post('login',this.loginForm)
                if(res.meta.status != 200) return this.$message.error('登录失败');
                this.$message.success('登录成功')
                // 将token保存起来
                window.sessionStorage.setItem('token',res.data.token)
                this.$router.push('/home')
            })
        }
    }
}
</script>

<style scoped>
    .login_container{
        background-color: #2b4b6b;
        height: 100%;
    }
    .login_box{
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left:50%;
        top:50%;
        transform: translate(-50%,-50%);     
    }
    .avatar_box{
        height: 130px;
        width: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px; 
        box-shadow: 0 0 10px #ddd; 
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        background-color: #fff;
    }
    .img{
        width: 100%;
        height:100%;
        border-radius: 50%;
        background-color: #eee;
    }
    .login_form {
        position: absolute;
        bottom: 0;
        right: 23px;
        width:90%;
        box-sizing: border-box;
    } 
    .btns{
        display: flex;
        justify-content: flex-end;
    }
</style>